# Copyright (c) 2018-2025, NVIDIA CORPORATION.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#     http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.

import pickle

from cuml.internals import GraphBasedDimRedCallback


class CustomCallback(GraphBasedDimRedCallback):
    pass


def test_callback_pickleable():
    obj = CustomCallback()
    buf = pickle.dumps(obj)
    obj2 = pickle.loads(buf)
    assert isinstance(obj2, CustomCallback)
